Some of the early research on serotonin is paying off.

This can cause there to be too much serotonin in the brain.

Human serotonin can also act as a growth factor directly.

Maybe my serotonin level was low, but his book left me feeling much less hopeful.

"But it's amazing how little we really do know about the serotonin system."

I have so much serotonin in my system it just made me high."

Not having enough of a brain chemical called serotonin may help cause the problem.

Serotonin is thought to play an important role in mood regulation.

It has been linked to serotonin levels in the brain.

When taking both products together, there is a chance that levels of serotonin may be increased in your body.

These drugs work by allowing the brain to have more serotonin.

The functions of serotonin are difficult to describe in a simple way.

Their main function is to release serotonin to the rest of the brain.

"That helps explain why the serotonin levels grew over time."

If you are worried about serotonin syndrome, talk to your doctor.

And you can influence serotonin levels by eating certain foods.

Serotonin is thought to have a role in regulating anxiety.

Dopamine and serotonin may have a role in such activity.

That changed, however, when the cells were exposed to serotonin for five minutes instead of two.

Earlier research had found that the drug appeared to cause a surge of serotonin.

Research shows that people with depression often have lower than normal levels of serotonin.

Some interesting studies show that women have approximately seven times less serotonin in the brain.

Studies have found that too much stress can lead to permanently low levels of serotonin.

This is a building block for the brain chemical serotonin.

They found that, on average, the men synthesized 52 percent more serotonin than the women did.